I spoke with the head coach an an assistant at the coaches convention a couple years ago. Great people, crazy amount of success, probably the most successful coach in the country if you look at the results with of course zero scholarships. I have great admiration and respect for them. They have about 50 stories about things such as the 10:50HS guy who became a 29:50 guy, etc.
His lectures don't really reveal much. They talk about team bonding, team unity, believing in yourself, believing in your teammates, etc with no mention of training other than the 6 AM morning run.
That is why I had to talk to him afterwards about what they actually did. It is not for the faint of heart. It is rigorous work on the handful of key fundamentals to success in distance running and it is repeated over and over and over again.
It consists of:
1) running twice a day 5-6 days a week. He noted that there was a 4 year period around 2010 I think in his 50 year career where he made the 600 AM run "optional" and most didn't show up. It was the worst 4 years in program history as far as NCAA finishes. He made it mandatory again and presto they were NCAA champions again in the first year.
2) Gradually building up mileage over 4 years to very high mileage.
3) Gradually increasing the weekly long run to very long.
4) Once a week doing a 5 mile tempo run.
5) Once a week doing 5 x 1 repeats at tempo effort.
6) In the last 6 weeks replacing the 5 x 1 mile with repeat 1000s at hard anaerobic effort
Then win or nearly win NCAA D3 XC team title and repeat year after year after year for 50 years
It is as simple and mundane as it is extraordinarily hard to be willing to stick to for 4 straight years and as it is extraordinarily effective.